High and low level audible boiler water alarm



E- TOPPING March 24, 1953 HIGH AND Low LEVEL AUDIBLE BoIEER WATER ALARM Filed oct. v25, 1951 2 sHEETs-sI-IEET 1 Eugene Topp/ng INVENTOR.

BY daz...

E TOPPING March 24, 1953 HIGH AND LOW LEVEL. AUDIBLE BOILER WATER ALARM Filed Oct. 25 1951 2 SI-IEETS-Sl-IEET 2 INVENTOR.

Patented Mar. 24, 1953 OFFICE than nNnLoWA-LEVELAUUIBLE norma WATER ALARM `fEugen1e Topping, Brooklyn, N. Application October 25, 19751, `Serial'No.f253,090

1 "4 Claims.

This invention .relates to new .and useful .improvements in signalling devices and the primary object ofthe `presen-t linvention is to pro- -vide a liquid level indicator for containers or hot water tanks whereby an alarm will be .activated in .response to a predetermined high or lowfliqufid -level in the tank, and more specifically the .invention Acom-prises a high and low level audible boiler water alarm.

lAnother important object of the present `invention is to provide a boiler water alarm Aincluding upper and lower l'closed tubular members that are in communication w-ith each other and a diaphragm Ysignal actuator and which upper and lower ymembers wiil be located above and below the normal :level of a liquid in a container respectively, whereby the actuator will be actuated in response to increase or decrease pressure on the kdiaphragm inthe event the level -of :liquid rises above both members or moves below both members.

A further object of the present invention is to provide 'a boiler water alarm "that is quickly and readily attached to or removed vfrom the -boii'e-r drum lin -a convenient manner to occupy very zlittle space within a tank.

A still #further naim ofthe `present invention is to provide an indicator of the aforementioned character that is extremely simple and practical in construction, strong and reliable in use, eiiicient in operation, convenient to adjust for various actuating pressures, inexpensive to manufacture, install and service, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to .like parts throughout, and in which:

Figure 1 is a fragmentary elevational View of la boiler drum and showing the present invention mounted thereon;

Figure 2 is a plan view of Figure l;

Figure 3 is an enlarged vertical sectional View taken substantially on the plane of broken section line 3--3 of Figure 2;

Figure t is an enlarged vertical sectional view taken substantially on the plane of section line of Figure 3; and,

Figure 5 is an enlarged vertical sectional view taken substantially on the plane of section line E-5 of Figure 2.

Referring now to the drawings in detail, where- .2 in V'for the jpurp'ose 'of "illustration, there is disclosed a preferred embodiment of the 'present invention, the numerals l and 'I2 represent upper and lower .closed tubular members 'of metallic construction having heat conducting iins lll and i6. Each oi the members 'le and l2 is ,provided 'with a nipple vin which lthe ends of a conduit i8 are 'suitably held to 'establish `coin- '.munication between the ytwo members. The upper member lil is provided with a'iilling opening i'nwhich va plug 2u is 'removably positioned.

Ahcusing 22 includes a removabie 'upper wall '2E 'that is detachablly connected to one 'end of a conduit 2e whose other end enters a nipple "B on the 'member l2. A 'diaphragm 30 is mounted in the housing 22 and 'overli'esthe "head 32 of a plunger 34 "sli'dably 'carried 'by the housing. Hanger arms "depend from 'the housing 'g2 and support 'a 'crossemem'ber 38 that is "iofrined 'with a 'central 'opening 'in 'which a kguide 'sleeve All is threaded. l K

A coil spring 'ft2 embraces the plunger 324 and is biased between the head 32 'and 'an abutment lt resting in the sleeved@ to yieldlingly urge the :head 32 vagainst the 'diaphragm 3l). '-Ih'e `sleeve @ati is adjustable to vary `the tension lof -sp'ring M.

'The lower wall 'oi Yhousing 22 fcrms the upper wall 01" ia valve housing #it `and :supports an v air whistle 48 or similar signal. A conduit 59 eX- tending from a source of air under pressure enters housing 4S. Slidable valves 52 and 54 in the housing control the passage of air to the whistle and are spring urged into their seats. The lower ends of the valves extend outwardly from the housing i6 above a rock lever 5t pivoted to the housing lit.

Lever 5t is formed with an eye end 58 that loosely receives the lower threaded end of plunger "it on which upper and lower abutments 66 and 52 are threaded above and below eye end 58.

Means is provided for supporting the members It and l2 relative to a steaming tank T and for selectively heating and cooling the liquid in the closed system defined by members It and l2, tubes i8 and 2t, and therdiaphragm. This means comprises a substantially Z-shaped combined pressure and heat controller tube 64 having upper and lower horizontal portions S6 and 58 that extend axiaily through members Yor jackets it and l2 and which have hollow lateral extensions lt and 'E2 that communicate with the interior of the tank.

Flanges it and 'le are fixed to the extensions 'it and '52, and these anges are suitably secured to the steaming tank with member It and portion 66 located above the normal liquid level of the steaming tank and with the member I2 and portion 68 located below the normal liquid level in the steaming tank.

In practical use of the present invention, a liquid is placed in the members I and I2, also tubes I8 and 26, and under normal temperature conditions and liquid level in the boiler T, the diaphragm 30 will be flexed slightly, as shown in Figure 5. The level of the liquid in the pressure and heat controller tube 64 will correspond to the level of liquid in the boiler T and the level of a water level indicating unit 'I8 mounted on the boiler.

When the boiler water level tends to rise in the boiler, the water level in the pressure and heat controller tube 64 will also rise and will enter the portion B6. This cold water plus the radiation of the fins I4, I6 causes the steam in portion -66 to condense, thereby reducing the pressure in the closed system allowing spring 42 to push diaphragm upward to blow whistle indicating high water level.

Should the boiler water level descend, the water level in pressure and heat controller tube 54 will likewise descend and the water in portion 65 will be replaced by steam that will enter the portion 66 from the boiler T. 'I'his will force water in the closed system I 0, I 8, I2, 26, 22 against the diaphragm causing an actuation of the whistle.

Having described the invention, what is claimed as new is:

1. In a device for indicating variations from a normal desired level of a liquid in a steaming tank, upper and lower closed tubular members, a conduit connecting the members, said tubular members and said conduit being lled with a liquid, means attached to one of the members adapted to be operatively connected to a pressure responsive signal actuator, and a pressure and heat controller tube supporting the members and having end portions extending through the members and adapted to communicate with the interior of a steaming tank.

42. In a steaming tank having a normal liquid level, an upper closed tubular member mounted above the normal liquid level, a lower tubular member mounted below the normal liquid level, a conduit connecting the members, said members and said conduii-I 'being filled with a liquid, and a pressure and heat controller tube having upper and lower portions extending through the members and communicating with the interior of the tank respectively above and below the normal liquid level, said lower member adapted to be connected to a pressure responsive signal actuator to actuate the same when the liquid level goes above the upper member or below the lower member.

3. The combination of claim 2 and attaching flanges at the ends of said tube mounted on the tank.

4. A boiler water alarm comprising upper and lower closed tubular metallic members one of which is adapted to be supported horizontally above the normal level of a liquid in a boiler and the other of which is adapted to be supported below the normal level of a liquid in a boiler, a conduit connecting the members, said conduit and said tubular members being lled with a liquid, a pressure and heat controller tube supporting the members and having end portions extending longitudinally through the members and adapted to communicate with the interior of a boiler, a housing communicating with the lower member, a diaphragm in thehousing, and a signal actuator slidably carried by the housing and engaged by the diaphragm, said diaphragm adapted to be flexed to actuate the actuator in response to pressure change in the housing from the liquid in the members.

EUGENE TOPPING.

`REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 841,186 Sandvoss Jan. 15, 1907 877,581 Moore Jan. 28, 1908 1,149,497 Clark Aug. 10, 1915 

